Income Taxes (Income from Continuing Operations Before Income Taxes) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract]
Domestic	$ 471.4	$ 340.2	$ 307.8
Foreign	266.1	275.6	252.3
Income before income taxes	$ 737.5	$ 615.8	$ 560.1